My friend is mad at me?......?

try to explain that you're really sorry to her and everybody in your group, and that it was a crazy, heat of the moment action you really regret, and you'll hope that she will forgive you. offer to tell her crush/ex something like that you were angry at her, so you "lied" and said that she liked him, so she won't keep being embarrased by the fact that he knows she likes him. or, try to make something good out of the fact that you told him. talk to him and try to persuade him to ask her out on a date, since he obviously knows she'll say yes. or something like that :)